Jadoon, Rizwan Abdul Malik, et al. “Correlation of Placental Thickness Measured Sonographically With the Gestational Age Estimated by Fetal Growth Parameters in Normal Singleton Pregnancy”. Pakistan Armed Forces Medical Journal, vol. 72, no. 2, Apr. 2022, pp. 341-44, https://doi.org/10.51253/pafmj.v72i2.6165.